Add Renode emulator driver for embedded target simulation (#533)

## Summary

- Introduce `jumpstarter-driver-renode`, a composite driver that enables
Renode-based virtual hardware targets in Jumpstarter
- Users can define any Renode-supported platform (STM32, S32K, Nucleo
H753ZI, etc.) via exporter YAML configuration without modifying driver
code
- Includes `RenodeMonitor` (async telnet client), `RenodePower` (process
lifecycle), `RenodeFlasher` (firmware loading via `sysbus
LoadELF`/`LoadBinary`), and `RenodeClient` (composite client with CLI
extension)


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Author: vtz

.github/workflows/python-tests.yaml

@@ -73,11 +73,22 @@ jobs:
           sudo apt-get update
           sudo apt-get install -y libgpiod-dev liblgpio-dev
 
+      - name: Install Renode (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          wget https://github.com/renode/renode/releases/download/v1.16.1/renode_1.16.1_amd64.deb -O /tmp/renode.deb
+          sudo apt-get install -y /tmp/renode.deb
+
       - name: Install Qemu (macOS)
         if: runner.os == 'macOS'
         run: |
           brew install qemu
 
+      - name: Install Renode (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          brew install renode/tap/renode
+
       - name: Cache Fedora Cloud images
         id: cache-fedora-cloud-images
         uses: actions/cache@v5